They're nice guns, a step above Ruger quality but not to the level of a Freedom Arms. They're overbuilt and very strong, and the .45-70 BFR's will take the HOT .45-70 loads, they do have a 450 Marlin version afterall which is nearly the same thing.
They're big though, I've got a 454 version and it's big enough, the .45-70 is just huge. They're accurate and well made, very nice guns for the money. Sure they're pricier than Rugers but they should be, they're nicer guns. If you want or need a powerful revolver, they're a fine option. If it's not a primary gun and you want smaller and more packable than you'll probably want something else.